User Manual

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412AlarmsExpressionMR400InstructionsforUse
TheExtremeTachycardiadeltavaluewillretainitsadjustedvalueastheHRhighalarmlimit
settingisadjusteddownward,butwillbegintoshrinkinvalueasthehighalarmlimitsettingis
adjustedclosertothealarmlimitmaximum.
Desat
AlarmSetting
TheDesatalarmsettingisres trictedtoamaximumvaluethatis2lesstheSPO2lowalarmlimit
setting,while theminimumsettingcanbeaslow asthealarmminimum.Seepage611forsetting
details.
AslongastheSPO2parameterison,theDesatalarm
valuewillretainthissettingevenifthefunc
tionisturnedoffandon.
TheSPO2alarmadjustmentsaredesignedtogiveprioritytothe Desatalarmsetting.Therefore,
theSPO2lowandhighalarmlimitsmayalsobeadjustedbasedonachangemadetotheDesat
alarmsetting.
WhenevertheDesatalarmsettingischanged,thefollowingrules determinethe
lowerandupperSPO2alarmlimits:
•IftheDesatalarmwasturnedonafterbeingsetandturnedoff,thenifthelastsetvalueof
theSPO2lowalarmlimitislessthantheDesatalarmsettingplus
2,theSPO2lowalarm
limitwillbesettotheDesatalarmsettingplus2.
•IftheDesatalarmisadjustedupwardsothatthesettingisgreaterthanorequaltothe
SPO2lowalarmlimitminus2,thentheSPO2lowalarmlimitwillbeincreasedbythe
systemsuchthattheDesatalarmsettingplus2isalwaysmaintained(i.e.,thelowalarm
limitwillalwaysmovetostaytwogreaterthanDesatalarmsetting).Iflowalarmlimitis
alteredduetothisscenario,lowalarmlimit willretainthisalteredvalueeveniftheDesat
alarmsettingisadjusteddownward.
•TheSPO2highalarmlimitwillbeadjustedasnecessaryinrelationtothelowalarmlimitas
perthenormalbehavioroflowandhighalarmlimits.
•TheSPO2lowalarmlimitwillbeallowedtobeadjusteddownwardonlyuntilitisequalto
the
Desatalarmsettingplus2.Nofurtherdownwardadjustmentoflowalarmlimitwillbe
alloweduntiltheDesatalarmsettingisadjusteddownward.
Setting Alarm Limits Globally
Globalchangestoallofthelowerandupperalarmlimitsettingscanbemadeautomaticallyby
pressingtheusingthe1TouchAlarmskey.Theseglobalchangesarecalculatedusing
percentagesselectedinthe1TouchHigh%andthe1TouchLow%options;seepage417.
During
calculationsifapatient’smonitoredvalueissohighorlowthatitwouldexceedthealarm
limitrangefortheparameter,thenthealarmlimitwillbesettothehighestorlowestpossible
valuebutnotoff,asindicatedinthetableonpage422.Forexample,
ifafterpressingthe1
TouchAlarmskey,apatientsSPO2upperalarmlimitsettingwas99(thehighestallowable
value),thenanalarmwillbegeneratedifthe patientsreadingreaches100.(Toturnoffanalarm
limit,seeSettingAlarmLimitsIndividuallyonpage413.)
Alsonotethat
settingalarmlimitsgloballymayresultinalowerSPO2alarmlimitthanthe
defaultsetting.ForapatientthathasanSpO2readingof99%,thenew upperlimitwillbe99but
thenewlowerlimitwillbe79(insteadof85)ata1TouchHigh%of
20(factorydefault).